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General| Brand | Casio |
|---|---|
| Model | SF-3900ER |
| Type | Organizer |
| Display | LCD |
| Number of Characters per Line | 20 |
| Number of Lines | 4 |
| Memory | 64 KB |
| Alarm | Yes |
| Power Source | Battery |
| Battery Life | Approx. 1 year |
Detailed steps for loading batteries and resetting the unit before initial use.
Essential safety guidelines, handling instructions, and warnings for device operation.
Explanation of the EL backlight, its use, and impact on battery life.
Information on low battery messages and adjusting display contrast for visibility.
Overview of setting and managing time, alarms, and time signals.
Instructions for setting Home Time, World Time, and managing time zones.
How to switch between 12-hour and 24-hour time formats.
Details on setting, turning on/off, and managing alarms and time signals.
Guide to entering text, symbols, and managing character input modes.
Procedures for inputting data into Telephone Directory and Schedule Keeper.
Instructions for inputting Expense, To Do, and Memo data.
Methods for searching and retrieving stored data using various search techniques.
Steps to edit existing data entries and delete specific records.
Procedures for accessing, registering passwords, and managing the secret memory.
Practical examples and instructions for performing currency conversions with pre-programmed rates.
Instructions for setting exchange rates and converting between currencies like USD and GBP.
Guide to using the calculator functions with various calculation examples.
Detailed steps for replacing batteries, including precautions to ensure data integrity.
Important precautions for battery handling, storage, and safety, especially for children.
Explanation of various system messages and their corresponding meanings and actions.
A reference table of cities, time zones, and time differences worldwide for quick lookups.
Technical details of the unit, including memory capacity, power, dimensions, and weight.
